Finishing the tail
Connect the two tail pieces by crocheting around both the second and first piece:
Here's what you just did, written out in pattern form:
Round 4: [4 sc, dec] x 2 (10)
Invisible fasten off, leaving a long tail:
Flatten the tail, and use the needle and yarn tail to sew the tail vertically to the back of the body, covering the color change jump and spanning rounds 10 to 12.